Choose your answer: Do "slip" and "it" point to the same thing in the following sentence?

It is not easy to space buttonholes exactly the same distance apart, and it is very difficult to cut them precisely the right size . The tiniest slip of the scissors will make the hole too large, and even one thread uncut will leave *it* too small.

Choose your answer from:
[A]. no.
[B]. yes.
[A].